CN201185347Y - Low-voltage dynamic reactive compensator - Google Patents
Low-voltage dynamic reactive compensator Download PDFInfo
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- CN201185347Y CN201185347Y CNU2008200329748U CN200820032974U CN201185347Y CN 201185347 Y CN201185347 Y CN 201185347Y CN U2008200329748 U CNU2008200329748 U CN U2008200329748U CN 200820032974 U CN200820032974 U CN 200820032974U CN 201185347 Y CN201185347 Y CN 201185347Y
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- reactive power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model discloses a low-voltage dynamic reactive power compensation device which comprises a passive power filter device FC (1), a thyristor control reactor TCR (2) and a control system (3), i.e. a TCR+FC type; the main points of the structure are as follows: the passive power filter device FC (1), the thyristor control reactor TCR (2) and a load (4) are parallelly connected with a rectiformer ZB low-voltage secondary side or a direct power distribution low-voltage (less than or equal to 1000V) bus (5) which is similar to load nature. The device can overcome the defects of the prior art with simple and reliable system as well as low cost, and is in particular applicable in quick reactive power compensation, voltage frustration inhibition, harmonic wave filtration and power coefficient improvement of main mill transmission systems in rolled metal material factories, mine shaft winch machine transmission systems, etc.
Description
Technical field
The utility model relate to a kind ofly be applicable to that the supply power voltage waveform seriously distorts, voltage fluctuation is big or load contains the occasion of high order harmonic component, such as the main mill drive system and the vertical shaft for mine hoist engine drive system of rolled metal material factory or have similar load character direct distribution low pressure (≤1000V) on the bus, carry out the dynamic reactive compensation device of harmonic and fast reactive power back-off.
Background technology
Incoming transport electrical network (6kV, 10kV, 35kV electric pressure etc.) industrial load, especially the rolling machine system of vertical shaft for mine hoist engine drive system and rolled metal material factory, its DC transmission device is generally to adopt 6 phase or 12 phase current transformers, the transmission device current transformer can produce 6k ± 1 or 12k ± 1 subharmonic (k is a positive integer) in the course of the work, electrical network is produced pollute.Because the voltage fluctuation meeting that the reactive power impact when vertical shaft for mine hoist engine when starting and mill milling causes influences the operate as normal of other power consumption equipments, eliminate voltage fluctuation must compensate reactive power.Simultaneously, the current transformer low power factor needs compensating power.For harmonic pollution and the reactive power compensation problem that solves similar applications, domestic general employing at present be:
1, the reactive power compensator of aontactless switch of Chinese patent specification: CN99109784.X description is the TSR+FC scheme.TSR is the special case of thyristor-controlled reactor TCR, thyristor or full conducting, or contract fully.Switched inductors and electronic control circuit that certain harmonic filter that this device is made of inductance and electric capacity, the thyristor inverse parallel of same size constitute are formed, the same bus of filter and switched inductors access in parallel.This patent is applicable to that the serious or load of supply power voltage wave distortion contains the occasion of enriching harmonic wave, can use 10kV or more on the voltage levels electrical network.This patent can have level compensation fast, improves power factor; The switched inductors (TSR) that the thyristor inverse parallel constitutes, thyristor or full conducting, or contract fully.Current waveform is sinusoidal wave, and therefore, self does not produce harmonic wave.Its shortcoming is when being used for 10kV and above electric power system thereof, because the limitation of thyristor self, thyristor will be connected, in case certain thyristor in the thyristor string is breakdown, all system voltage just is added on other several the thyristors, causes other thyristor puncture and causes that the thyristor string punctures.The reactive power that the switched inductors (TSR) that is made of the thyristor inverse parallel provides for system is to have level adjustable.In load fluctuation hour, reactive power compensation is difficult to select, and can cause switched inductors to throw and owe to mend, and excision is crossed the phenomenon of mending again and taken place.Can not provide continuously adjustable reactive power for electrical network.At present, this technical scheme can cause this increase when being applied to 10kV and above electric power system thereof, and enforcement can cause certain degree of difficulty.
2, Static Type Dynamic Reactive Compensation Device (SVC), i.e. TCR+FC scheme are installed.The metallurgical industry load is milling train or arc furnace normally, and this nonlinear-load can produce a large amount of high order harmonic components in process of production and flow into electrical network and load through bus, transformer, causes the harmonic wave public hazards.The method and apparatus that Chinese patent specification: CN02152793.8 describes is used to compensate the industrial load reactive power consumption is exactly this scheme (SVC), it comprises the first cover compensation arrangement (TCR) that is used for controlled reactive power consumption and is used to produce the second cover compensation arrangement (FC) of reactive power that two devices all are parallel on the AC network (6kV～35kV bus) with load.The first cover compensation arrangement (TCR) is thyristor control reactance, and is normally interconnective with delta connection, and the second cover compensation arrangement comprises and is used for a plurality of filters parallel with one another.Control system is made up of voltage check device and current sensing means and control device, and control device sample rate current voltage signal obtains corresponding phase-shift control angle α as calculated and regulates the bus reactive power after the reactive power of bus.This device energy quick adjustment power system reactive power improves the static state and the dynamic stability of electric power system, improves voltage fluctuation and voltage flicker.But the shortcoming that this Static Type Dynamic Reactive Compensation Device (SVC) is installed is: the control system complexity, thyristor will be connected, in case certain thyristor in the thyristor string is breakdown, all system voltage just is added on other several the thyristors, cause other thyristor puncture and cause that the thyristor string punctures, thyristor-controlled reactor itself is a very big harmonic source.In addition, Static Type Dynamic Reactive Compensation Device (SVC) being installed costs an arm and a leg.
3, a kind of dynamic and static state combined electric filtering device of describing as Chinese patent specification: CN200620165010.1 is installed.It comprises passive electric filtering device FC, segmented thyristor-controlled reactor and control system, wherein FC is connected on transformer station's high voltage bus, its structural feature is: the segmented thyristor-controlled reactor comprises n-1/n by thuristor throw-in and throw-off reactor TSR and 1/n thyristor-controlled reactor TCR, and is connected on the rectifier transformer low-pressure side in parallel with bus respectively.It has overcome the deficiency that the TSR+FC scheme can not regulated reactive power continuously to a certain extent, control system is simple relatively, do not need the thyristor series connection to improve electric pressure, controlled cost of investment, but because FC is connected on the 6kV of transformer station～10kV bus, can not carry out reactive power compensation and harmonic on the spot, too much adopt the TSR device to make the loaded down with trivial details and continuous adjusting reactive power really meaning of equipment simultaneously.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of low pressure dynamic reactive compensation device is provided, and not only control system is simple and reliable, cost is low but also can carry out reactive power compensation and harmonic on the spot for it, and can really regulate reactive power continuously.
For realizing described target, the utility model low pressure dynamic reactive compensation device comprises passive electric filtering device FC, thyristor-controlled reactor TCR and control system, be the TCR+FC type, its structural feature is: passive electric filtering device FC and thyristor-controlled reactor TCR all with load together and be connected in rectifier transformer low pressure secondary side or have similar load character direct distribution low pressure (≤1000V) on the bus.
The utility model compared with prior art its advantageous effect is as follows:
1, since rectifier transformer low pressure secondary side or directly distribution low pressure (≤1000V) on the bus passive electric filtering device (FC) has been installed, can make the required lagging reactive power of load at rectifier transformer low pressure secondary side local compensation, the required lagging reactive power of promptly loading does not become by (or the overwhelming majority is not passed through) rectification, thereby improves exerting oneself of rectification change.Simultaneously, high order harmonic component is absorbed on the spot, the a large amount of harmonic currents that produce during the work of nonlinear-loads such as the power electronic device in the transmission device just do not need to pass through rectifier transformer, because the filter in the TCR+FC type low-voltage reactive compensator capable provides the passage of higher harmonic current at rectifier transformer low pressure secondary side, thereby reduced the harmonic loss of rectifier transformer, reduced the electric and magnetic oscillation and the noise of rectifier transformer.In other words, the low benefit that presses has alleviated the burden that rectification becomes greatly, can prolong the useful life that rectification becomes.
2, since TCR be installed in the low pressure secondary side of rectifier transformer or directly distribution low pressure (≤1000V) on the bus, operating voltage low (≤1000V), do not need the thyristor series and parallel, reduced cost, control system is simple and reliable, has improved the stability and the reliability of device; Because rectifier transformer is ready-made equipment, do not need to install additional in addition step-down transformer again, saved cost of investment widely.
3, this TCR+FC type low-voltage reactive compensator capable can be according to the perceptual idle output of the idle variation quick adjustment Controlled Reactor of loading, suppress rectifier transformer low pressure secondary side or directly distribution low pressure (≤1000V) voltage fluctuation on the bus, thereby the exerting oneself of stable electrical motivation.Low press benefit solved rectifier transformer low pressure secondary side or directly distribution low pressure (≤1000V) on the bus in the voltage fluctuation problem, also solved the voltage fluctuation problem of high voltage bus in the lump.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is the block diagram form that the utility model (TCR+FC) type low pressure dynamic reactive compensation device is used for the embodiment of the main mill drive system rectifier transformer low pressure secondary side reactive power compensation of rolled metal material factory and harmonic.
Embodiment
Fig. 1 has provided the utility model (TCR+FC) type low pressure dynamic reactive compensation device and has been used for the main mill drive system rectifier transformer low pressure secondary side reactive power compensation of rolled metal material factory and the examples of implementation of harmonic, this device comprises that one is socketed in the passive electric filtering device (FC) 1 that is used to absorb harmonic wave and reactive power compensation on the drive system rectifier transformer ZB low pressure secondary side, one is socketed in the thyristor-controlled reactor (TCR) 2 that drive system rectifier transformer ZB low pressure secondary side is used for the fast Absorption reactive power, and a cover control system 3.Control system 3 high tension voltage current signal inputs are connected on rectifier transformer ZB high pressure primary side voltage transformer pt 1 summation current transformer CT1; control system 3 low voltage voltage current signal inputs are connected on rectifier transformer ZB low pressure secondary side voltage transformer pt 2 summation current transformer CT2; the idle signals collecting of control system 3 collection, computing, adjusting, and functions such as thyristor pulse-triggered and system protection are in one.Passive electric filtering device (FC) 1 fixing the access on the low-voltage bus bar 5, the capacitive reactive power of its generation is constant relatively.When milling train load 4 reactive powers change, voltage, the current signal of control system 3 sampling rectifier transformer ZB high pressure primary side PT1 and CT1, and voltage, the current signal of CT2 in rectifier transformer ZB low pressure secondary side PT2 and thyristor-controlled reactor (TCR) 2 loops, calculate reactive power, relatively get control signal with the reactive power of setting, regulate the angle of thyristor trigger impulse, change perceptual idle that low-pressure side thyristor-controlled reactor (TCR) 2 absorbs.Thereby realize the function of quick dynamic compensation reactive power described in the utility model, raising power factor and harmonic.
Low pressure dynamic reactive compensation device of the present utility model is to implement like this:
Be connected on the passive electric filtering device (FC) the 1st that is used to absorb harmonic wave and reactive power compensation on the drive system rectifier transformer ZB low pressure secondary side, be designed to certain subharmonic series resonant tank respectively according to characteristic harmonics and the uncharacteristic harmonics number of times that load produced, and formation reaches the purpose that absorbs harmonic wave to the impedance path of certain subharmonic.The rectifier transformer ZB of drive system is 6 commutating phases or equivalent 12 commutating phases normally, produce harmonic number and be (6K ± 1) inferior or be that (12K ± 1) is inferior.Usually design passive electric filtering device (FC) 1 is divided into H5, H7, H11, filter branch such as H13.The reactive power compensation capacity is according to calculated load on the low-voltage bus bar and fully take into account the harmonic compensation capacity and definite.
Low pressure secondary side at rectifier transformer ZB inserts thyristor-controlled reactor (TCR) 2, can dynamically regulate reactive power fast continuously.Its pilot angle α changes between 90 ° and 180 °, control system is by gathering voltage, the current signal of rectifier transformer ZB high pressure primary side PT1 and CT1, calculate this rectification and become total reactive power, compare with the reactive power of setting, occur (being capacitive Q when sending when detecting total reactive power
CThe time), milling train zero load this moment, control system 3 is sent instruction, reduces trigger angle α (90 °≤α≤180 °) and controls TCR device increase absorption lagging reactive power, and the capacitive reactive power of fixing with passive electric filtering device (FC) 1 balances each other.When detecting total reactive power is perceptual when idle, milling train load this moment 4 work, control system 3 is sent instruction, increase trigger angle α (90 °≤α≤180 °) controls the TCR device and reduces to absorb lagging reactive power, it is idle to make passive electric filtering device (FC) 1 fixing capacitive reactive power be used for compensating the needed perception of load, suppress voltage fluctuation, power factor is reached more than 0.95.
Therefore, the utility model low pressure dynamic reactive compensation device (TCR+FC type) is compared with prior art, system is simple and reliable, and reduced investment, be particularly suitable for the main mill drive system and the vertical shaft for mine hoist engine drive system of rolled metal material factory or have similar load character the direct distribution low pressure of drive system (≤1000V) be used for fast reactive power back-off on the bus, suppress voltage fluctuation, carry out harmonic and improve power factor.
Claims (2)
1, a kind of low pressure dynamic reactive compensation device, comprise passive electric filtering device FC (1), thyristor-controlled reactor TCR (2) and control system (3), be the TCR+FC type, it is characterized in that: described passive electric filtering device FC (1) and thyristor-controlled reactor TCR (2) are with load (4) and be connected on the bus of rectifier transformer ZB low pressure secondary side.
2, low pressure dynamic reactive compensation device according to claim 1 is characterized in that: described passive electric filtering device FC (1) and thyristor-controlled reactor TCR (2) can also be connected on the direct distribution low-voltage bus bar with similar load character with load (4) is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNU2008200329748U CN201185347Y (en) | 2008-03-17 | 2008-03-17 | Low-voltage dynamic reactive compensator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200329748U CN201185347Y (en) | 2008-03-17 | 2008-03-17 | Low-voltage dynamic reactive compensator |
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| CN201185347Y true CN201185347Y (en) | 2009-01-21 |
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| CNU2008200329748U Expired - Lifetime CN201185347Y (en) | 2008-03-17 | 2008-03-17 | Low-voltage dynamic reactive compensator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280881A (en) * | 2011-08-05 | 2011-12-14 | 中国电力科学研究院 | Three-phase static var compensator (SVC) device for electrified railway traction side |
| CN102403726A (en) * | 2011-12-21 | 2012-04-04 | 常州莱宝电力滤波有限公司 | Thyristor switched reactive compensation and filter device |
| CN103208802A (en) * | 2013-04-12 | 2013-07-17 | 武汉高特维电气有限公司 | Low-voltage large-current power quality control system |
| CN105375496A (en) * | 2015-11-05 | 2016-03-02 | 国网山东省电力公司青岛供电公司 | Parallel reactor configuration method and parallel reactor configuration system |
| CN108695852A (en) * | 2018-06-24 | 2018-10-23 | 上海圣缑电磁设备有限公司 | Filter and its power-economizing method |
| CN110176773A (en) * | 2019-03-07 | 2019-08-27 | 日照钢铁控股集团有限公司 | A method of in emergency circumstances by calculating jettisoning static reactive power compensator |
| CN113363999A (en) * | 2021-05-07 | 2021-09-07 | 国网辽宁省电力有限公司 | Dynamic management method for distribution network voltage considering rolling mill load |
-
2008
- 2008-03-17 CN CNU2008200329748U patent/CN201185347Y/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280881A (en) * | 2011-08-05 | 2011-12-14 | 中国电力科学研究院 | Three-phase static var compensator (SVC) device for electrified railway traction side |
| CN102280881B (en) * | 2011-08-05 | 2015-03-25 | 中国电力科学研究院 | Three-phase static var compensator (SVC) device for electrified railway traction side |
| CN102403726A (en) * | 2011-12-21 | 2012-04-04 | 常州莱宝电力滤波有限公司 | Thyristor switched reactive compensation and filter device |
| CN103208802A (en) * | 2013-04-12 | 2013-07-17 | 武汉高特维电气有限公司 | Low-voltage large-current power quality control system |
| CN105375496A (en) * | 2015-11-05 | 2016-03-02 | 国网山东省电力公司青岛供电公司 | Parallel reactor configuration method and parallel reactor configuration system |
| CN105375496B (en) * | 2015-11-05 | 2017-12-15 | 国网山东省电力公司青岛供电公司 | The collocation method and system of a kind of shunt reactor |
| CN108695852A (en) * | 2018-06-24 | 2018-10-23 | 上海圣缑电磁设备有限公司 | Filter and its power-economizing method |
| CN108695852B (en) * | 2018-06-24 | 2024-01-23 | 上海圣缑电磁设备有限公司 | Filtering device and energy-saving method thereof |
| CN110176773A (en) * | 2019-03-07 | 2019-08-27 | 日照钢铁控股集团有限公司 | A method of in emergency circumstances by calculating jettisoning static reactive power compensator |
| CN113363999A (en) * | 2021-05-07 | 2021-09-07 | 国网辽宁省电力有限公司 | Dynamic management method for distribution network voltage considering rolling mill load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: MCC Alex Hua Tian Ma'anshan power filter Co., Ltd. Assignor: Zhongye Huatian Engineering Technology Co., Ltd. Contract record no.: 2011340000366 Denomination of utility model: Low-voltage dynamic reactive power compensation device Granted publication date: 20090121 License type: Exclusive License Record date: 20110824 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090121 |